Sumatron has completed electrical design reviews for the following facilities:

(1) Large refinery

(5) Peaking unit stations

(7) Combustion turbine generating stations

(13) Oil/gas fired steam generation stations

(8) Coal fired steam generation stations

(1) Nuclear generating station (protecton only)

The largest station completed was 2,800 megawatts. Most of the facilities were older than 10 years, but a few were under 2 years. Since all reviews disclosed problems that could easily be resolved and result in significant cost savings, the customers considered them more than worthwhile. Typically findings were:

Protective relays not coordinated properly.

Protective relays set outside the withstand capability of the apparatus being protected.

The electrical design reviews for multiple unit generating stations can normally be completed in 60 hours of on-site work and includes a written report and presentation to plant management. It works best to have someone from your company participate in the review; preferably, an electrical engineer that is responsible for the station or group of stations, or a protective relay technician. This participation has three advantages, it provides training or mentoring for the participant, reduces the time spent in locating drawings and documents related to the review, and finally the participation facilitates plant buy-in of the recommendations presented in the report.